Underwater heat pipe reactor liquid metal passive residual heat removal system

The invention discloses an underwater heat pipe reactor liquid metal passive residual heat removal system which comprises a reactor core, a heat pipe heat exchanger and a liquid metal chamber which are sequentially connected together, the liquid metal chamber is composed of an inner layer chamber and an outer layer chamber, a heat pipe bundle is composed of an evaporation section and a condensation section, the evaporation section is inserted into the reactor core, and the condensation section is inserted into the inner layer chamber. The condensation section penetrates through the heat pipe heat exchanger, and the end of the condensation section is inserted into the inner-layer cavity. When a heat trap loss accident occurs in the heat pipe reactor, the cavity upper end valve and the cavity lower end valve lose power, at the moment, the cavity upper end valve and the cavity lower end valve are opened, liquid metal in the liquid metal cavity forms natural circulation, and finally decay waste heat is led out to